Elevator



T. E. DE voL.

ELEVATOR. APPLICATION FILED SEPT.I8, I920.

Patented Jan. 31, 1922.

2 SHEETS-SHEET 1'- T. E. DE -VOL.-

ELEVATOR.

APPLlCATlON FILED SEPT-18. 1920.

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com rs STATES PATENT JOFFI(3151.

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Application filedseptenlber 18, 1920. Seri al No. 411,069.

To {ZZZ ,w/zom ,it may concern Be ,it knownithat I, HOMAS E- D VO a citizen of the :United States, residing at mdain thecounty of Nance and State of Nebraska, have invented certain new, and us f l Improv ment in an Eleva o I which the following is aspecification.

This invention relates to,.elevating. devices, more particularly to devices of this char- 1 1 61 employed for elevating a vehlcle at oneenjd t dump the load "therefrom, and

I hasfor one of;its objects tosimplify and improve the construction and increase the efficieneyand utility of devices of this character. -j M 1;.

,Anotherobject of the nventlon s toprovide-a device of this c aracter adapted to be ;inst alled in the floor of .a building, or in a. scale platform,, without displacing or changing any ofthe floorjoist or other supports With-these andother objects in view, the

invention consists in certain novel features of construction as ,hereinafter shown and described and then specifically pointed out in the claims, and in thedrawings illustrative of the preferred embodiment of the-invention.

Figure 1 is a .perspective View ofthe-improved device inelevated position with a portion of .the floor ,broken, away to show the construction.

.Fig. 2 is; a transverse section with the parts in lowered position.

,Fig. ,3 isia sideelevation with the floor and adjacent portions in section, and the elevating mechanism in lowered position.

,4 is a plan view showing the improved device installed in the floor portion of a platform scale.

The improved device is designed'to be installed in an opening in the floor of an elevator, store house, the platform of a scale, or like locality, and for the purpose of illustion is shown in Figs. 1, 2 and 3 installed in an opening in a floor indicated conventionally at 10 and supported upon the usual joist indicated at 15.

In Fig. 4 the device is shown embodied in the floor 12 of a conventional platform scale.

The improved device includes main supporting or side plates 13, bolted or otherwise attached at 14 to the confrontlng faces of a pair of the j oist15 of the floor 10. The joist selected to support the plates may be any vlieqniregil .pair and, spaced .at .any required distance, .as the zi-nterven-in'g joists are 1 not .disturbed :by the installing of the plates and the elevating mechanism associated therewithasiillustrated in Fig.1.2.

Eitchof ;-the plates .is slotted as shown at 17 nearoneend and each provided with a bearing 18.130 rotativelysupport' a main operatingshaft 19. 2'

The platform onsup .orto-f the elevating mechanism includes a. oor-..or platform 21 supported upon beams: or stringers .23," the latter preferably of-LL bars, as, shown.

Anopenlngis formed in.the v,main floor- 10 s mewhat widen-than the spaced defined by the joist 15 to which the plates 13. are

attached, as ShQwnineFi-g. -2',-,..and the plat- 1 form 21,.fits relatively closein the opening, so that when, the elev ting mechanism is lowered. the platform 2.1 is flush with the ma-infioor 10, as shown in Figs..2,-3 and 4t,

and rests upon all the which extend main fioor. I

Attached to the under faces of the main portions of the .joist ;beneath .the opening in the floor -.10,at theendsofthef openingj are small 1;

lugs orsupports 2f1projecting into the openlngand upon which the horizontal webs of 23 rest when-.the platform 211s dethe bars pressed, as shown in Fig. 3, to bear a portionpfthe downward strain, when the elevating mechanism is in its lower position. The vertical webs ofthei L bars 23 are slotted at .oneend, as shown. at 2 5 and corresponding ot s o O t e p at s r D isposed' between ;the bars- 23 and ,plates 13 are sets of lazy tongmembers 26,..the lowermost of the m I mbers. 26 being pivoted at 27 at one end to the plates 13, while the uppermost; of, the members. 26 are pivoted at 28 to the members 23. The intermediate members 26 are provided respectively with pivots 29 and 30 extending through the slots 17 and 25 and provided with anti-friction rollers 31 and 32 engaging in the slots.

The members 26 are pivotally united where they cross as at 33, and the:ter1ninals bearing 38 to engage the shaft 19 internally of the plate and each strap carrying a bearintermediate members pivotally ing roller 39 to engage the untoothed edges of the rack bars, to maintain the rack bars in position and decrease'the friction.

Attached to the shaft 19 is a worm gear 40, and supported in a hanger frame 41 at- V tached to one of the joist members 15, is a.

shaft 42 carrying a Worm pinion 43 engaging the Worm gear 40. 1

By this arrangement it will be obvious that when rotary motion is applied to the shaft 42. this motion will be transmitted through the gears 43, 40 and 36 to the shaft 19 and thus move the bars 35-vertically, and. elevate or depress the platform 21.

Any suitable power may be employed to rotate the shaft 19, but for the purpose of illustration an electric motor, shown conventionally at 44, is employed for this purpose.

The platform 21 is designedmore particularly to receive the forwardwheels'of a mo-' tor truck or other load carrying vehicle and elevate the vehicle at the-forward end to cause the dumping of the load from the rear or tail end, and operates very effectually for that purpose.

At their lower ends the rack bars 35 are coupled by a stay rod 45, and mounted on this rod are cable guide pulleys 46 while other cableguide pulleys 47 and 48 are suspended in yoke frames 49 and 50 from the plates 13.

Cables 51 are connected respectively at 52 to the plates 13 and passed around the several guide pulleys 46, 49 and 50 and are provided with counter Weights 53 at the ends.

By this means a constant upwardpulling force is applied to the platform 21 to reinforce the elevating power.

The worm gear 40 and worm pinion 43 coact to lock the bars 35 and platform'21 at any point of elevation, as will be obvious.

he lazy tong members serve effectually as diagonalbraces to rigidly support the platform and prevent lateral displacement under the strains of the load which it is required to bear.

The preferred embodiment of the invention is disclosed in the drawings and set forth in the specification, but it will be understood that any modifications within the scope of the claims may be made in the construction without departing from the principle of the invention or sacrificing any of its advantages.

1 claim:

1. An apparatus of the class described comprising supporting plates adapted to be attached to floor joist in spaced relation, a platform, beam members connected to said platform, rack bars rigidly connected at one end to said beam members, a power shaft supported in said supporting plates, pinions carried by said shaft and engaging said rack bars, brace members diagonally disposed and ivotally united to each other and pivotally un'ted respectively to the plates and beams, and means for rotating said shaft. f

2. An apparatus of the class-described comprising supporting plates adapted to be attached to floor joist in spaced relation, a platform, beam members connected to said platform, rack bars connected to said beam members, a power shaft supported in said 4 supporting plates, pinions carried by said shaft and engaging said rack bars, brace members'diagonally disposed and pivotally united toeach other and pivotally united'respectively to the plates and beams, means for rotating said shaft, and counter weights coupled tosaid rack bars to apply constant upward strain thereto. v

'3. An apparatus of the class described comprising supporting plates adapted to be attached to floor joist in spaced relation, a platform, beam members connected'to said platform, rack bars connected to said beam members, a power shaft supported in said supporting plates, pinionscarried by said shaft and engaging'said rack bars, brace members diagonally disposed and pivotally united to each other and pivotally united respectively to the plates and beams, a worm gear rotative with said power shaft, a drive shaft, and a worm pinion upon saiddrive shaft and engaging said worm gear.

In testimony'whereof, I affix my signature 

